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Navien Adaptor SC Inlet 20058120A

Navien

Navien Adaptor SC Inlet 20058120A

SC inlet adaptor for Navien NCB500-1S and NCB500-2S combi boilers.

At a glance

  • Part type: SC inlet adaptor
  • Appliance family: NCB500 series
Manufacturer part no.
20058120A
Showing prices

£4.45

£3.71 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Navien SC inlet adaptor (part number 20058120A) is a connection component used on Navien NCB500 series combi boilers. It provides the inlet connection point on the appliance, joining the incoming supply to the boiler's internal pipework. It is supplied as an individual part.

Signs this part needs replacing

  • Weeping or dripping at the inlet connection
  • Corrosion or rust staining around the adaptor body
  • Scale or debris build-up restricting flow at the inlet
  • Damaged or cross-threaded connection threads
  • A joint that will not seal after being re-made

Before you order

  • Confirm the appliance is a Navien NCB500 series combi and match the model against the fit list above.
  • Check the serial number against the ranges listed, as fitment is given by serial number.
  • Inspect the existing adaptor and its connection point to confirm the part matches before ordering.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.